You don’t need special app functionality for exporting to PDF – you’ll notice that Print to PDF (which is also sometimes known as Save as PDF) is usually included by default. The major advantage of printing to PDF is that it makes it easy for your files to be saved and/or shared with someone else. Although you’re not physically printing anything, printing to PDF saves a file that looks exactly like what would have come out from a real printer. Thinking of it as “printing” helps explain the feature.
Printing to PDF is an easy way of saving information in its original layout.